body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #f8f9fa;
    margin: 0;
    padding: 0 10%;
}
h1, h2, h3 {
    color: #333;
}
header {
    background: #fff;
    padding: 20px 0 10px 0;
    border-bottom: 1px solid #e5e5e5;
    margin-bottom: 24px;
}
nav {
    margin-bottom: 10px;
}
nav a {
    margin-right: 18px;
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
}
nav a.active, nav a:hover {
    color: #0056b3;
    text-decoration: underline;
}
.category-bar {
    margin-bottom: 18px;
    padding: 8px 0;
}
.category-bar a {
    margin-right: 12px;
    color: #555;
    padding: 2px 8px;
    border-radius: 3px;
    text-decoration: none;
    font-size: 15px;
}
.category-bar a.active, .category-bar a:hover {
    background: #007bff;
    color: #fff;
}
.article-list {
    margin-bottom: 24px;
}
.article-card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px #eee;
    padding: 20px 24px;
    margin-bottom: 18px;
}
.article-card h2 {
    margin: 0 0 8px 0;
    font-size: 22px;
}
.article-card .meta {
    color: #888;
    font-size: 13px;
    margin-bottom: 10px;
}
.article-card .summary {
    color: #444;
    font-size: 15px;
    margin-bottom: 8px;
}
.article-card .read-more {
    color: #007bff;
    text-decoration: none;
    font-size: 14px;
}
.article-card .read-more:hover {
    text-decoration: underline;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    background: #fff;
}
table, th, td {
    border: 1px solid #ccc;
}
th, td {
    padding: 8px 12px;
    text-align: left;
}
button {
    background: #007bff;
    color: #fff;
    border: none;
    padding: 6px 12px;
    border-radius: 3px;
    cursor: pointer;
}
button:hover {
    background: #0056b3;
}
input, textarea {
    padding: 4px 8px;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin-bottom: 8px;
}
.pagination {
    margin: 10px 0;
    text-align: center;
}
.pagination a {
    margin: 0 5px;
    color: #007bff;
    text-decoration: none;
}
.pagination a:hover {
    text-decoration: underline;
} 